Various apparatus and methods for an actuator and display using one more shape memory springs. A shape memory spring is heated and urges a pin to a first or extended position. The pin may be supported in the first position by a supporting mechanism. The shape memory spring is heated electically, and...http://www.google.se/patents/US6705868?utm_source=gb-gplus-sharePatent US6705868 - Apparatus and methods for a shape memory spring actuator and display
